Wrench



A. A. MUTCHMOR.

WRENCH.

APPLICATION FILED FEB. 15, 1921.

1,434,911. Mamm z, 1922.

Fig.1,

FL f 55 11;? 29k 8 120 I31 l' g 4 r 10 2. f B} 1 8 g L 0 1.12 12 qry T o3 i L a Z? ,1 Q h I 2% Arthur A, muzai WWgJ Patented Nov. 7, 1922aUNITED STATES PATENT ARTHUR A. MUTCHMOB, OF OAKLAND, CALIFORNIA.

WRENCH.

Application filed February 15, 1921. Serial No. 445,234.

To call /1 am it may concern.

Be it known that I, ARTHUR A. MU'rcH- MOR, a citizen of the UnitedStates, residing at Oakland, in the county of Alameda and State ofCalifornia, have invented certain new and useful Improvements inWrenches. of which tlie'following is a specification.

My invention is an improved wrench which combines the followingfeatures, solidity, adaptability, simplicity, durability, will notloosen, will hold tightly, will stay when once set and may bemanufactured cheaply.

Referring to the annexed drawing in which my invention is illustratedand which forms a part of this specification:

Figure 1 is a side view of my wrench.

Figure 2 is a longitudinal section of my wrench.

Figure 3 is an under side view of my wrench with the removable jaw andthe locking cam lever removed.

Figure 4 is a side view of the movable aw.

Figure 5 is a side view of the locking block.

In the drawing 1 indicates the wrench frame which includes the wrenchhandle 2 and stationary jaw 3. The movable jaw 4 has a shank 5 at itsinner end which slides through an opening 6 extending trans verselythrough the frame 1 at the inner end of the stationary jaw 3. Guides, 7extend from the inner side of the frame 1 at the inner end of the jaw 3at the sides of the opening 6 between which guides the jaw 4 and itsshank 5 slide. The shank 5 has a longitudinal slot 8 through which a pin9 extends, which pin is secured in the guides 7, said pin being adaptedto engage the outer end of the slot 8 to prevent the jaw 4 and its shank5 from coming off the frame 1. Ratchet teeth 10 are formed on the rearedge of the jaw shank 5. Lugs 11 extend from the inside of the frame 1rearwardly of the guides 7 and a guide 12 is formed between the outerends of the guides 7 and lugs 11, A locking block 13 is slidably mountedbetween the guide 12 and the inner face of the frame 1, the forward edgeof said block being formed with ratchet teeth 14 which engage theratchet teeth 10 of the jaw shank 5. Pins 15 project from the sides ofthe block 13, around which pins are coiled springs 16, the ends of whichengage pins 1'? and 18 extending from the sides of the guide and theframe 1 respectively. The springs 16 yieldingly hold the block in itsforward position with its teeth 1.4 in engagement with shank teeth .10.A cam lever 20 is fulcrunied between the lugs llv on pivot 21 which issecured at its ends in said lugs; On said lever is a cam 22 for engagingthe rear edge of the block 13 to force the same forwardly and the teeth14 thereof into looking engagement with the teeth 10 of the shank 5 tolock the jaw 4 against movement. A ring 25 is pivoted through the rearend of handle 2 and may be swung over the end of the lever 20 to holdthe cam 22 in engagement with block 13 and the teeth thereof inengagement with the teeth 10 of jaw shank 5, thus locking the jaw 4 inany position with relation to jaw 3. When the cam 22 is swung out oflocking engagement with block 13, the jaw 4 may be moved toward the jaw3 because the springs 16 will yield and allow the teeth 10 to escape theteeth 14, but said teeth will prevent the jaw 4 from being moved awayfrom the jaw 3.

Having described my invention, 1 claim:

1. A wrench including a frame, a stationary jaw and a handle on saidframe, a movable jaw, a shank on said movable jaw mounted in said frameso that said movable jaw may slide toward or away from said stationaryjaw, teeth on said shank, a sliding block mounted. in said frame, teethon said block, a cam on said frame forengaging said block and forcingthe teeth thereof into locking engagement with the teeth on said shankto lock said movable jaw, a cam lever for actuating said cam, said shankhaving a longitudinal. slot extending nearly its length, and a pinsecured on the frame extending through said slot to prevent the movablejaw from coming off the frame.

2. A wrench including a frame, a stationary jaw and afhandle on saidframe, a movable jaw, a shank on said movable jaw mounted in said frameso that said movable jaw may slide toward or away from said stationaryjaw, teeth on said. shank, a sliding block mounted in said frame, teethon said block, a cam on said frame for engaging said block and forcingthe teeth thereof into locking engagement with. the teeth on said shankto lock said movable jaw, a cam lever for actuating said cam, and springmeans for yieldingly holding said block in its forward position with itsteeth in engagement with the teeth of said shank.

3, A wrench including a frame, a station.- ary j aw, and a'handle onsaid frame, a movable jaw, a shank on said movable jaw mounted in saidframe so that said movable jaw may slide toward or away from saidstationary jaw, ratchet teeth on said shank, a sliding block mounted insaid frame, ratchet teeth on said block, a cam'on said frame forengaging said block and forcing the ratchet teeth thereof into lockingengagement with the teeth on said shank to lock said movable jaw, a camlever for actuating said cam and spring means for yieldingly holdingsaid block in its forward position with its ratchet teeth in engagementwith the ratchet teeth of said shank, so thatthe movable jaw may bemoved toward the stationary jaw but cannot be moved away therefrom.

4. A wrenehincluding a frame, a stationextending outwardly from thesides of said block, pins projecting from. the sides of the wrench. andsprings coiled respectively around said block pins with their endsengaging the pins on the wrench for holding said block with its teeth inengagement with the teeth of said shank.

In testimony whereof I aflix my signature.

ARTHUR A. MUTCHMOR.

